Influence of Nanoparticles on Laser Weld Microstructure of 2195 Al-Li Alloy

Fig. 4. Microstructures of laser self-melting welded joint in different areas. (a) Macro morphology; (b) upper right corner of weld; (c) center of weld; (d) bottom right corner of weld

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Fig. 5. Microstructures of joint by laser wire filling welding with 4047 in different areas. (a) Macro morphology; (b) upper right corner of weld; (c) center of weld; (d) bottom right corner of weld

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Fig. 6. Microstructures of joint by laser wire filling welding with 2319 in different areas. (a) Macro morphology; (b) upper right corner of weld; (c) center of weld; (d) bottom right corner of weld

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Fig. 7. Weld width of upper surface and cross-sectional area of laser welded joint

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Fig. 8. Weld width of upper surface and cross-sectional area of laser welded joint. (a) Laser self-melting welding; (b) laser wire filling welding with 2319

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Fig. 9. Tensile strength values and elongation rates of laser welded joints under different welding methods

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Fig. 10. Fracture morphologies of laser welded joints during tensile testing. (a) Laser welding; (b) laser welding with 4047 filler wire; (c) laser welding with 2319 filler wire

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Table 1. Main chemical compositions of 2195 Al-Li alloy, 4047 filler wire, and 2319 filler wire (mass fraction, %)

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Table 1. Main chemical compositions of 2195 Al-Li alloy, 4047 filler wire, and 2319 filler wire (mass fraction, %)

Element	Li	Cu	Mg	Zr	Ag	Zn	Mn	Si	Fe	Cr	Ti	V	TiC	Al
2195	1.10	4.00	0.40	0.11	0.40	≤0.25	≤0.25	-	-	-	-	-	-	Bal.
4047 filler wire	-	0.0300	0.1000	-	-	0.2000	0.1500	12.0000	0.8000	0.0500	0.0025	-	-	Bal.
2319 filler wire	-	5.600	0.200	-	-	0.100	0.300	0.200	0.300	-	0.150	0.100	2.000	Bal.

Table 2. Energy spectrum results of EQZ elements in laser self-melting welding
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Table 2. Energy spectrum results of EQZ elements in laser self-melting welding
Position Al mass fraction /% Cu mass fraction /% Mg mass fraction /% Si mass fraction /%
Grain interior 72.48 7.12 0.61 0.31
Grain boundary precipitate 48.78 25.93 0.83 0.60

Table 3. Energy spectrum results of EQZ elements in laser welding with 4047 welding wire
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Table 3. Energy spectrum results of EQZ elements in laser welding with 4047 welding wire
Postion Al mass fraction /% Cu mass fraction /% Mg mass fraction /% Si mass fraction /%
Grain interior 87.81 3.3 0.95 0.87
Grain boundary precipitate 71.63 6.39 0.68 13.21

Table 4. Energy spectrum results of EQZ elements in laser welding with 2319 filler wire
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Table 4. Energy spectrum results of EQZ elements in laser welding with 2319 filler wire
Position Al mass fraction /% Cu mass fraction /% Mg mass fraction /% Si mass fraction /%
Grain interior 90.64 2.53 0.83 0.48
Grain boundary precipitate 59.35 30.45 1.70 1.28

Table 5. Cu element contents in weld by laser welding with filling wire

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Table 5. Cu element contents in weld by laser welding with filling wire

Condition	Mass fraction of Cu element /%	Element burnout rate /%	Element replenishment rate /%
Base metal	4.00	-	-
Laser welding without wire filling	3.40	15.00	-
Laser welding with 4047 filler wire	2.76	31.00	-
Laser welding with 2319 filler wire	4.26	-	6.50

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Xiaohong Zhan, Yue Li, Yanqiu Zhao, Jianfeng Wang, Xuesong Gao, Jun Zhou. Influence of Nanoparticles on Laser Weld Microstructure of 2195 Al-Li Alloy[J]. Chinese Journal of Lasers, 2023, 50(12): 1202101

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Paper Information

Category: Laser Forming Manufacturing

Received: Oct. 18, 2022

Accepted: Nov. 24, 2022

Published Online: Apr. 14, 2023

The Author Email: Zhan Xiaohong (xiaohongzhan_nuaa@126.com)

DOI:10.3788/CJL221337

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Main chemical compositions of 2195 Al-Li alloy, 4047 filler wire, and 2319 filler wire (mass fraction, %)

Table 1. Main chemical compositions of 2195 Al-Li alloy, 4047 filler wire, and 2319 filler wire (mass fraction, %)

Table 2. Energy spectrum results of EQZ elements in laser self-melting welding

Table 2. Energy spectrum results of EQZ elements in laser self-melting welding

Table 3. Energy spectrum results of EQZ elements in laser welding with 4047 welding wire

Table 3. Energy spectrum results of EQZ elements in laser welding with 4047 welding wire

Table 4. Energy spectrum results of EQZ elements in laser welding with 2319 filler wire

Table 4. Energy spectrum results of EQZ elements in laser welding with 2319 filler wire

Table 5. Cu element contents in weld by laser welding with filling wire

Table 5. Cu element contents in weld by laser welding with filling wire